mohon jawabannya ,no 2 dan 3 itu pakai caranya

2. Diketahui = I = 500 ma = 0,5 Ampere
                      R = 140 ohm
Ditanya = P =____?
P = I².R
P = (0,5)².R
P = 0.25 x 140 = 35 Watt (C)
3. Diketahui = R1 = 60 Ohm
                       R2 = 120 Ohm
                       R3 = 40 Ohm
                       V = 6 Volt
Ditanya = R. Paralel =____?
R4 = 1/R1+1/R2
R4 = 1/60 +1/120
R4 = 2/120 + 1/120
R4 = 3/120
3.R4 = 120
R4 = 120/3 = 40 Ohm
R.Paralel = 1/40 +1/40
R.Paralel = 2/40
R.Paralel = 40/2 = 20 ohm (B)